Marine Weather and Tide Forecast for Richmond Hill, GA
May 13, 2024 8:41 PM EDT (00:41 UTC) Change Location
 | Sunrise 6:26 AM Sunset 8:15 PM Moonrise 10:16 AM Moonset 12:10 AM |
AMZ354 Waters From Savannah Ga To Altamaha Sound Ga Out 20 Nm, Including Grays Reef National Marine Sanctuary- 639 Pm Edt Mon May 13 2024
.small craft advisory in effect until 6 am edt Tuesday - .
Tonight - SE winds 15 to 20 kt, increasing to 20 to 25 kt late this evening. Seas 3 to 4 ft, building to 4 to 5 ft after midnight. Wave detail: se 4 ft at 4 seconds and E 1 foot at 8 seconds, becoming se 4 ft at 5 seconds and E 1 foot at 8 seconds. Showers this evening, then showers likely with a slight chance of tstms after midnight.
Tue - SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in the afternoon. Wave detail: se 4 ft at 7 seconds. Showers and tstms likely, mainly in the morning.
Tue night - SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight. Wave detail: se 4 ft at 7 seconds, becoming se 3 ft at 7 seconds. A chance of showers and tstms.
Wed - SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave detail: se 4 ft at 7 seconds, becoming sw 3 ft at 4 seconds and se 3 ft at 7 seconds. A chance of showers and tstms, mainly in the morning.
Wed night - W winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: se 3 ft at 7 seconds and W 1 foot at 3 seconds. A slight chance of showers and tstms in the evening.
Thu - W winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave detail: W 2 ft at 3 seconds and se 2 ft at 7 seconds.
Thu night - S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight.
Fri - S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.
Fri night - S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sat - SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
Sat night - SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.
winds and seas higher in and near tstms.
winds and seas higher in and near tstms.
AMZ300 639 Pm Edt Mon May 13 2024
Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - A warm front will lift northward through the area Tuesday morning, followed by a cold front from the west Tuesday night. High pressure will return to the area by Thursday, followed by another storm system this weekend.
Area Discussion for - Charleston, SC
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FXUS62 KCHS 132332 AFDCHS
Area Forecast Discussion National Weather Service Charleston SC 732 PM EDT Mon May 13 2024
SYNOPSIS
A warm front will lift northward through the area Tuesday morning, followed by a cold front from the west Tuesday night.
High pressure will return to the area by Thursday, followed by another storm system this weekend.
NEAR TERM /UNTIL 6 AM TUESDAY MORNING/
The early evening update shows an MCS passing into the Florida Peninsula, with the northern extent of its convection starting to diminish over the immediate area. As a result, we have shown a steady diminishing trend to the rain early tonight. However, with mid level impulses to continue to slide through, and isentropic ascent to persist, we do maintain slight chance/chance PoPs prior to midnight. Given that there is little to no CAPE or elevated, we have removed mention of t-storms early tonight. By late tonight the next MCS, impacting southeast Texas and the lower Mississippi Valley will approach. That occurs in tandem, with a warm front lifting north, and a weak surface wave is expected to develop and move up the GA/SC coast.
Models are all over the place regarding coverage and timing of convection associated with this wave. We focused the greatest PoPs over the eastern half of the area late tonight, closest to the forecast trajectory of the surface wave. Not a lot of instability is expected, though models do hint at a pocket of 500-1000 J/kg CAPE over coastal southeast GA late tonight where a few strong thunderstorms are possible.
SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/
Tuesday and Tuesday night: The most active portion of the short term period will come Tuesday and Tuesday night with a rather complex forecast. As Tuesday morning begins, a warm front will be lifting northward across the forecast area which should then clear to the north by late morning. Forcing aloft will be provided by a closed low and associated trough near the Mississippi Valley that will gradually work eastward through the day. At the start of the day, the main convective complex will likely be crossing north Florida, with other convection ongoing along and near the warm front. While the activity across north Florida should stay south of the Altamaha, it could sneak into far southern southeast Georgia along the coast and bring the potential for strong to severe thunderstorms. Along the warm front, thunderstorms should be ongoing and lifting to the north and northeast through the morning. We have the highest rain chances during this morning time period, with 60-80 percent along the southeast South Carolina coast and along the Savannah River and to the northeast. As the warm front gets north of the Santee River and the activity to the south pushes out over the coastal waters, we should see a lull before additional convection tries to develop later in the afternoon after recovery ahead of the cold front from the west. This activity will likely extend well into the evening before the frontal zone pushes off the coast late. Activity during this time should be more scattered in coverage, and rain chances are held more into the 30-40 percent range as a result.
Severe Thunderstorms: With the morning activity, the severe threat will likely be tied to the environment along and near the warm front. Model soundings do show MLCAPE around 1,000 J/kg, with 40-50 knots of mid-level flow. There is also some decent veering thanks to the presence of the warm front that could yield SRH values on the order of 150-200 m2/s2. So while damaging wind gusts are the primary threat, the ambient wind profiles will also produce a low end tornado threat. The threat should wane by midday as the activity moves off to the northeast with the front. Attention then turns to the afternoon and evening. While the veering noted in the morning diminishes, mid-level flow remains notable in the 40-50 knot range.
Also, mid-levels dry out and yield DCAPE values of 1,000 J/kg or more which should help to enhance the damaging wind gust threat.
This potential with scattered thunderstorms will continue into the late evening hours.
Rainfall: Total rainfall amounts are still generally expected to be in the 0.50-1.50" range. The highest amounts are expected along the southeast South Carolina coast up through the Charleston Tri-County region. Rainfall amounts, especially at the high end of the range, will be very dependent on exactly where thunderstorms track.
Wednesday through Thursday: The area will be situated within the circulation around an area of low pressure near the Outer Banks.
While a few showers could linger across the Tri-County region early on Wednesday, the bulk of the day is expected to be dry. Weak high pressure will build in on Thursday and bring a quiet weather day.
Highs each day are forecast to reach the upper 80s for most areas.
LONG TERM /THURSDAY NIGHT THROUGH MONDAY/
Shortwave ridging will pass through Thursday night ahead of a shortwave that will cross into the Appalachians and the East Coast through Saturday. A cold front is expected to approach Friday and Friday night and push through the area on Saturday. An area of thunderstorms is depicted by the model consensus and should impact the area at some point during this time period. Active weather could extend into Sunday as well, but there is uncertainty as to the timing of the front and any thunderstorms associated with it. So the overall theme of the long term period is increased rain chances and above normal temperatures.
AVIATION /00Z TUESDAY THROUGH SATURDAY/
An MCS to the south will pull away early tonight, with an upstream MCS to approach late tonight, and pass nearby Tuesday morning. A warm front will also lift north through the area Tuesday morning.
It's a rather complicated forecast, but it does look like flight restrictions will occur for much of the upcoming 00Z TAF cycle, with with at least some chance of SHRA at times overnight into Tuesday. We can rule out a TSRA at KCHS and KJZI Tuesday morning with the warm front. But probabilities are much too low at this stage to mention in the TAFs.
We do show MVFR ceilings beginning the period at KSAV, and taking until 10Z to develop at KCHS and KJZI. However, IFR is possible at times, and adjustments could be made later on.
Extended Aviation Outlook: Additional showers and thunderstorms could impact the terminals with brief flight restrictions Tuesday evening. Otherwise, VFR conditions should prevail.
MARINE
As the front lifts north this evening, winds over the GA waters are expected to increase substantially, particularly over the nearshore GA waters. We anticipate a period of 25 kt gusts late this evening into the overnight, before the gradient relaxes a bit. Over the outer GA waters, seas expected to rise to 6 ft beyond 40 nm due to the strengthening SE flow. We have a Small Craft Advisory for both GA marine zones beginning this evening.
Also, on the SC waters as the back edge of the steadier rains pull away and some drier air temporarily moves in, there can be some gusts to near 25 kt. This includes the Charleston Harbor.
However, this looks to be infrequent enough that we don't require an advisory.
Tuesday through Saturday: A warm front will lift through the waters early Tuesday and turn the flow from southeasterly to be more southerly. Winds should mostly peak in the 15-20 knot range, but there could be a few gusts to 25 knots at times.
Winds will diminish a bit later Tuesday, but then become southwesterly and pick up ahead of a cold front that will push offshore late Tuesday night. Winds should mostly be in the 15-20 knot range during this time. Winds will become more westerly Wednesday night into Thursday, then southerly by Friday. Seas will be highest Tuesday and Tuesday night, with 3-5 ft common, and up to 6 ft expected in the outer Georgia waters and the Charleston County waters. The advisory for the outer Georgia waters goes through noon Tuesday and the Charleston County waters goes into Tuesday evening.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory from 8 AM to 8 PM EDT Tuesday for AMZ350.
Small Craft Advisory until 6 AM EDT Tuesday for AMZ354.
Small Craft Advisory until noon EDT Tuesday for AMZ374.
Area Forecast Discussion National Weather Service Charleston SC 732 PM EDT Mon May 13 2024
SYNOPSIS
A warm front will lift northward through the area Tuesday morning, followed by a cold front from the west Tuesday night.
High pressure will return to the area by Thursday, followed by another storm system this weekend.
NEAR TERM /UNTIL 6 AM TUESDAY MORNING/
The early evening update shows an MCS passing into the Florida Peninsula, with the northern extent of its convection starting to diminish over the immediate area. As a result, we have shown a steady diminishing trend to the rain early tonight. However, with mid level impulses to continue to slide through, and isentropic ascent to persist, we do maintain slight chance/chance PoPs prior to midnight. Given that there is little to no CAPE or elevated, we have removed mention of t-storms early tonight. By late tonight the next MCS, impacting southeast Texas and the lower Mississippi Valley will approach. That occurs in tandem, with a warm front lifting north, and a weak surface wave is expected to develop and move up the GA/SC coast.
Models are all over the place regarding coverage and timing of convection associated with this wave. We focused the greatest PoPs over the eastern half of the area late tonight, closest to the forecast trajectory of the surface wave. Not a lot of instability is expected, though models do hint at a pocket of 500-1000 J/kg CAPE over coastal southeast GA late tonight where a few strong thunderstorms are possible.
SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/
Tuesday and Tuesday night: The most active portion of the short term period will come Tuesday and Tuesday night with a rather complex forecast. As Tuesday morning begins, a warm front will be lifting northward across the forecast area which should then clear to the north by late morning. Forcing aloft will be provided by a closed low and associated trough near the Mississippi Valley that will gradually work eastward through the day. At the start of the day, the main convective complex will likely be crossing north Florida, with other convection ongoing along and near the warm front. While the activity across north Florida should stay south of the Altamaha, it could sneak into far southern southeast Georgia along the coast and bring the potential for strong to severe thunderstorms. Along the warm front, thunderstorms should be ongoing and lifting to the north and northeast through the morning. We have the highest rain chances during this morning time period, with 60-80 percent along the southeast South Carolina coast and along the Savannah River and to the northeast. As the warm front gets north of the Santee River and the activity to the south pushes out over the coastal waters, we should see a lull before additional convection tries to develop later in the afternoon after recovery ahead of the cold front from the west. This activity will likely extend well into the evening before the frontal zone pushes off the coast late. Activity during this time should be more scattered in coverage, and rain chances are held more into the 30-40 percent range as a result.
Severe Thunderstorms: With the morning activity, the severe threat will likely be tied to the environment along and near the warm front. Model soundings do show MLCAPE around 1,000 J/kg, with 40-50 knots of mid-level flow. There is also some decent veering thanks to the presence of the warm front that could yield SRH values on the order of 150-200 m2/s2. So while damaging wind gusts are the primary threat, the ambient wind profiles will also produce a low end tornado threat. The threat should wane by midday as the activity moves off to the northeast with the front. Attention then turns to the afternoon and evening. While the veering noted in the morning diminishes, mid-level flow remains notable in the 40-50 knot range.
Also, mid-levels dry out and yield DCAPE values of 1,000 J/kg or more which should help to enhance the damaging wind gust threat.
This potential with scattered thunderstorms will continue into the late evening hours.
Rainfall: Total rainfall amounts are still generally expected to be in the 0.50-1.50" range. The highest amounts are expected along the southeast South Carolina coast up through the Charleston Tri-County region. Rainfall amounts, especially at the high end of the range, will be very dependent on exactly where thunderstorms track.
Wednesday through Thursday: The area will be situated within the circulation around an area of low pressure near the Outer Banks.
While a few showers could linger across the Tri-County region early on Wednesday, the bulk of the day is expected to be dry. Weak high pressure will build in on Thursday and bring a quiet weather day.
Highs each day are forecast to reach the upper 80s for most areas.
LONG TERM /THURSDAY NIGHT THROUGH MONDAY/
Shortwave ridging will pass through Thursday night ahead of a shortwave that will cross into the Appalachians and the East Coast through Saturday. A cold front is expected to approach Friday and Friday night and push through the area on Saturday. An area of thunderstorms is depicted by the model consensus and should impact the area at some point during this time period. Active weather could extend into Sunday as well, but there is uncertainty as to the timing of the front and any thunderstorms associated with it. So the overall theme of the long term period is increased rain chances and above normal temperatures.
AVIATION /00Z TUESDAY THROUGH SATURDAY/
An MCS to the south will pull away early tonight, with an upstream MCS to approach late tonight, and pass nearby Tuesday morning. A warm front will also lift north through the area Tuesday morning.
It's a rather complicated forecast, but it does look like flight restrictions will occur for much of the upcoming 00Z TAF cycle, with with at least some chance of SHRA at times overnight into Tuesday. We can rule out a TSRA at KCHS and KJZI Tuesday morning with the warm front. But probabilities are much too low at this stage to mention in the TAFs.
We do show MVFR ceilings beginning the period at KSAV, and taking until 10Z to develop at KCHS and KJZI. However, IFR is possible at times, and adjustments could be made later on.
Extended Aviation Outlook: Additional showers and thunderstorms could impact the terminals with brief flight restrictions Tuesday evening. Otherwise, VFR conditions should prevail.
MARINE
As the front lifts north this evening, winds over the GA waters are expected to increase substantially, particularly over the nearshore GA waters. We anticipate a period of 25 kt gusts late this evening into the overnight, before the gradient relaxes a bit. Over the outer GA waters, seas expected to rise to 6 ft beyond 40 nm due to the strengthening SE flow. We have a Small Craft Advisory for both GA marine zones beginning this evening.
Also, on the SC waters as the back edge of the steadier rains pull away and some drier air temporarily moves in, there can be some gusts to near 25 kt. This includes the Charleston Harbor.
However, this looks to be infrequent enough that we don't require an advisory.
Tuesday through Saturday: A warm front will lift through the waters early Tuesday and turn the flow from southeasterly to be more southerly. Winds should mostly peak in the 15-20 knot range, but there could be a few gusts to 25 knots at times.
Winds will diminish a bit later Tuesday, but then become southwesterly and pick up ahead of a cold front that will push offshore late Tuesday night. Winds should mostly be in the 15-20 knot range during this time. Winds will become more westerly Wednesday night into Thursday, then southerly by Friday. Seas will be highest Tuesday and Tuesday night, with 3-5 ft common, and up to 6 ft expected in the outer Georgia waters and the Charleston County waters. The advisory for the outer Georgia waters goes through noon Tuesday and the Charleston County waters goes into Tuesday evening.
CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory from 8 AM to 8 PM EDT Tuesday for AMZ350.
Small Craft Advisory until 6 AM EDT Tuesday for AMZ354.
Small Craft Advisory until noon EDT Tuesday for AMZ374.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| FPKG1 - 8670870 - Fort Pulaski, GA | 24 mi | 54 min | S 13G | 72°F | 76°F | 29.96 | ||
| SAXG1 - Sapelo Island Reserve, GA | 37 mi | 42 min | SE 12 | 67°F | 29.98 | 67°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 46 mi | 32 min | SSE 23G | 72°F | 75°F | 29.95 | 69°F |
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KSVN HUNTER AAF,GA | 11 sm | 33 min | SE 11G20 | 10 sm | Overcast | 70°F | 63°F | 78% | 29.91 | |
| KLHW WRIGHT AAF (FORT STEWART)/MIDCOAST RGNL,GA | 12 sm | 46 min | SE 07 | 10 sm | Overcast | 66°F | 63°F | 88% | 29.90 | |
| KSAV SAVANNAH/HILTON HEAD INTL,GA | 14 sm | 48 min | SSE 11 | 10 sm | Overcast | 70°F | 63°F | 78% | 29.94 |
Highway bridge
Click for Map
Mon -- 01:09 AM EDT Moonset
Mon -- 03:55 AM EDT 1.07 feet High Tide
Mon -- 06:28 AM EDT Sunrise
Mon -- 11:15 AM EDT Moonrise
Mon -- 11:27 AM EDT 0.13 feet Low Tide
Mon -- 04:36 PM EDT 0.88 feet High Tide
Mon -- 08:14 PM EDT Sunset
Mon -- 11:34 PM EDT 0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 01:09 AM EDT Moonset
Mon -- 03:55 AM EDT 1.07 feet High Tide
Mon -- 06:28 AM EDT Sunrise
Mon -- 11:15 AM EDT Moonrise
Mon -- 11:27 AM EDT 0.13 feet Low Tide
Mon -- 04:36 PM EDT 0.88 feet High Tide
Mon -- 08:14 PM EDT Sunset
Mon -- 11:34 PM EDT 0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Highway bridge, Ogeechee River, Georgia, Tide feet
| 12 am |
| 0.2 |
| 1 am |
| 0.5 |
| 2 am |
| 0.8 |
| 3 am |
| 1 |
| 4 am |
| 1.1 |
| 5 am |
| 1 |
| 6 am |
| 0.9 |
| 7 am |
| 0.8 |
| 8 am |
| 0.6 |
| 9 am |
| 0.4 |
| 10 am |
| 0.2 |
| 11 am |
| 0.1 |
| 12 pm |
| 0.2 |
| 1 pm |
| 0.3 |
| 2 pm |
| 0.5 |
| 3 pm |
| 0.7 |
| 4 pm |
| 0.9 |
| 5 pm |
| 0.9 |
| 6 pm |
| 0.8 |
| 7 pm |
| 0.7 |
| 8 pm |
| 0.6 |
| 9 pm |
| 0.4 |
| 10 pm |
| 0.2 |
| 11 pm |
| 0.2 |
Fort McAllister
Click for Map
Mon -- 01:09 AM EDT Moonset
Mon -- 01:24 AM EDT 7.12 feet High Tide
Mon -- 06:28 AM EDT Sunrise
Mon -- 08:18 AM EDT 0.90 feet Low Tide
Mon -- 11:15 AM EDT Moonrise
Mon -- 02:05 PM EDT 5.90 feet High Tide
Mon -- 08:13 PM EDT Sunset
Mon -- 08:25 PM EDT 1.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Mon -- 01:09 AM EDT Moonset
Mon -- 01:24 AM EDT 7.12 feet High Tide
Mon -- 06:28 AM EDT Sunrise
Mon -- 08:18 AM EDT 0.90 feet Low Tide
Mon -- 11:15 AM EDT Moonrise
Mon -- 02:05 PM EDT 5.90 feet High Tide
Mon -- 08:13 PM EDT Sunset
Mon -- 08:25 PM EDT 1.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Fort McAllister, Ogeechee River, Georgia, Tide feet
| 12 am |
| 6.3 |
| 1 am |
| 7.1 |
| 2 am |
| 7 |
| 3 am |
| 6.4 |
| 4 am |
| 5.3 |
| 5 am |
| 4 |
| 6 am |
| 2.6 |
| 7 am |
| 1.5 |
| 8 am |
| 0.9 |
| 9 am |
| 1.1 |
| 10 am |
| 2 |
| 11 am |
| 3.3 |
| 12 pm |
| 4.5 |
| 1 pm |
| 5.5 |
| 2 pm |
| 5.9 |
| 3 pm |
| 5.7 |
| 4 pm |
| 5 |
| 5 pm |
| 3.9 |
| 6 pm |
| 2.7 |
| 7 pm |
| 1.7 |
| 8 pm |
| 1.1 |
| 9 pm |
| 1.2 |
| 10 pm |
| 2.1 |
| 11 pm |
| 3.5 |
Charleston, SC,
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